Hose-coupling.



HARRY ZIMMERMAN, OF

FREDERICK, MARYLAND.

HosE-couPLl'Nc;

sPEc'IFIoaTo forming part of Letters Patent 110.627,664, dated June 27, ieee.

" Application filed December 23, 1897. Serial No. 663,230. (No model.)

To all whom it may concern,.-

Be it known that 1.HARRY ZIMMERMAN, a

' citizen of the United States, residing at Frederick, Frederick county, State of Maryland,` have invented certain new and useful Improvenients in Hose-Couplings', of which the following is a specification.

My invention has for rts'object to couple together the adjacent ends of iie'xible pipes;

and-my invention consists of a coupling device composed of a rigid tube having enlarge,- ments near the ends and rings adapted vto pass from one to the-other of the pipes and to close the joints tightly regardless of the thickness of the pipes, substantially as described hereinafter and illustrated indthe accompanying drawmgs' in which" Figure 1 is a longitudinal section of my improved pipefcoupling, and Fig. 2 is an exterior View of one of the pipes detached.

A is a rigid tube, preferably of. metal and having a smooth outer face with -an enlargement a, near each end, the tube preferably tapering in both directions from said enlargement, as shown in Figs. land 2, so that the' ends4 offtwo llexible pipe-sections B B may bey readily passed onto -the opposite ends of the coupling-tube and meet at the center ofthe latter, thereby wholly covering the tube.

G C are two rings, preferably of round wirewith smooth faces, each adapted to pass fully over. the enlargements, lbut of such size that when the pipes B B are upon the ends of the A.as

tube the said rings cannot be applied or withdrawn over they ends of the tube.

v, In cbnnecting the pipe-sections by the coupling/,device one'end-of the' tube vA is first in- .t'roduced into the end'cfnesectinnfand .then

Vno

both rings C C a're passed over the exposed end of the tube A and placedupon that part of the pipe B which -is inside the enlargement a and isl not expanded thereby: The end of thel other pipe-section is then passed onto the ex- Eand of the tube A, and the inner of the two rngs,Fig. 2, is carried to the right and the other is moved to the left to the position shown in Fig. 1. As lthe rings are carried toward the expanded portions of the pipes the latter are compressed upon the inner tapering parts of the enlargements, and owing. to the presence of these inner tapering parts' any draft upon latter gradually over those parts, compressing them more and more between the saine and separate the pipe-sections from the coupling device or tend to loosen the joints. On the contrary, the'joints will be tightened in proa portion as the draft is increased.

`lf it becomesA necessary to detach either pipe-section, this can be done by shifting the the other and withdrawing the released section from the coupling-tube. It will be seen that this can be eected without the necessity of vdistu rbing the undetached sections in any way, without turning either the rings, the tube, or the pipes,

ex't'erirorinterior of either pipe-section.

Itis very desirable that the taper from the middle part of the pipe to each enlargement be or thin the-rubberis held tight tothe inclined face, and whatever the position of the ring upon a curved line.

` While the rings may be of diderent shapes, I prefer section, .as when such ring is applied the pressure exerted upon thepipe resting on the tapering tube is practically always inward and there isno backward pressure against l come loose.. The ring is further detained by the action of the rubber in expanding to nornot occurwith awide dat ring.

While it is preferable, it is not absolutely necessary to make the face of the tube inside the enlargements tapering, as shown in Figs.

the pipes will 'tend to draw the jacent ends of iexible pipes and rings adaptthe rings, so that no amount ofdraft will ring C 0E of the end of said 'section and onto and without abrading the comparatively long and a straight taper, bep cause there is then along range of adjustment l, for the rings, and whether the. pipe be thick the pressure always is in the same direction, which would not be the case .if the taper was to make them of wire round in lcrossg l the face of the ring nor any tendency to bef mal size on eachside'of each ring, which would 1 and 2, aspthe enlargements may contract abv ICO ed to pass from the end of one flexible pipe round bearing-surfaces adapted to pass over to the other, substantially as described. the' ends of the flexible pipes, substantially 2. The combination of a rigid tube formed as described. of a single piece having its ends and central In testimony whereof I have signed my 5 portion of uniform external diameter and exnamev to this specification in the presence of I5 terior annular smooth-surfaced enlargements two subscribing witnesses.

tapering toward the ends and center of the HARRY ZIMMERMAN. tube, iexible pipes surrounding the tube and Witnesses: A having their ends abutting at the longitudi- E W. CLARENCE DUVALL,

1o nal center thereof, and rings formedl withv PAUL W. STEVENS. 

